11 53 000 Removing And Installing/Replacing Coolant Thermostat (N52K)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding!
Only perform this work after engine has cooled down.

Recycling

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste-disposal regulations.

IMPORTANT: Protect plug connections against coolant and contamination.
Cover plug connections with suitable materials.

Necessary preliminary tasks:

Drain coolant . See 17 00 005 DRAINING AND ADDING COOLANT (N52, N52K, N51, N53) .

NOTE: For purposes of clarity, the picture and text refer to the component when removed.

Unfasten hose clip (1).

Tightening torque. See 11 53 5AZ in THERMOSTAT AND CONNECT .

Remove coolant hose.

Unfasten hose clip (2).

Tightening torque. See 11 53 6AZ in THERMOSTAT AND CONNECT .

Remove coolant hose.

Unlock and detach coolant hose (3).

Fig 1: Locating Thermostat

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Identifying Hose Clip, Coolant Hose, Plug Connection And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach coolant hose (4).

Disconnect plug connection (5).

Release screws (6).

Tightening torque. See 11 53 1AZ in THERMOSTAT AND CONNECT .

Remove coolant thermostat (7). See 11 53 000 REMOVING AND INSTALLING/REPLACING COOLANT THERMOSTAT (N52K) .

Assemble engine.